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// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "starboard/system.h"
#include <sys/utsname.h>
#include <cstring>
#include <memory>
#include <string>
#include "starboard/common/device_type.h"
#include "starboard/common/log.h"
#include "starboard/common/string.h"
#include "starboard/shared/environment.h"
namespace {
const char* kBrandName = "Raspberry Pi Foundation";
const char* kModelRevision = "Rev";
const char* kFriendlyName = "Raspberry Pi";
// Read device model from /proc/device-tree/model
std::string GetModelName() {
const char* file_path = "/proc/device-tree/model";
// Size of the raw data
size_t file_data_size;
file_data_size = 0;
// Get the size of the file by reading it until the end. This is
// required because files under /proc do not always return a valid size
// when using fseek(0, SEEK_END) + ftell(). Nor can the be mmap()-ed.
FILE* file = fopen(file_path, "r");
if (file != nullptr) {
for (;;) {
char file_buffer[256];
size_t data_size = fread(file_buffer, 1, sizeof(file_buffer), file);
if (data_size == 0) {
break;
}
file_data_size += data_size;
}
fclose(file);
}
const size_t kFileSizeCap = 1000;
if (file_data_size > kFileSizeCap) {
SB_LOG(ERROR)
<< "File too large: /proc/device-tree/model is larger than 1KB.";
return "";
}
// Read the contents of the /proc/device-tree/model file.
const size_t kFileDataSize = file_data_size + 1;
char file_data[kFileDataSize];
char* file_data_ptr = file_data;
memset(file_data_ptr, 0, file_data_size + 1);
file = fopen(file_path, "r");
if (file != nullptr) {
for (size_t offset = 0; offset < file_data_size;) {
size_t data_size =
fread(file_data_ptr + offset, 1, file_data_size - offset, file);
if (data_size == 0) {
break;
}
offset += data_size;
}
fclose(file);
}
// Zero-terminate the first line of the file because the model name is in the
// first line
for (int i = 0; i < file_data_size; i++) {
if (file_data_ptr[i] == '\n') {
file_data_ptr[i] = '\0';
break;
}
}
// Zero-terminate the file data
file_data_ptr[file_data_size] = '\0';
// Get Model name
std::string model_string(const_cast<char*>(file_data));
std::string model_name;
// Find the revision number of the model name and remove it if present
int model_rev_pos = model_string.find(kModelRevision);
if (model_rev_pos != std::string::npos) {
model_name = model_string.substr(0, model_rev_pos);
}
// Trim trailing spaces
size_t end = model_name.find_last_not_of(" \t");
if (end != std::string::npos) {
return model_name.substr(0, end + 1);
} else {
return "";
}
}
bool CopyStringAndTestIfSuccess(char* out_value,
int value_length,
const char* from_value) {
if (strlen(from_value) + 1 > value_length)
return false;
starboard::strlcpy(out_value, from_value, value_length);
return true;
}
} // namespace
bool SbSystemGetProperty(SbSystemPropertyId property_id,
char* out_value,
int value_length) {
if (!out_value || !value_length) {
return false;
}
switch (property_id) {
case kSbSystemPropertyBrandName:
return CopyStringAndTestIfSuccess(out_value, value_length, kBrandName);
case kSbSystemPropertyModelName:
return CopyStringAndTestIfSuccess(out_value, value_length,
GetModelName().c_str());
case kSbSystemPropertyChipsetModelNumber:
case kSbSystemPropertyFirmwareVersion:
case kSbSystemPropertyModelYear:
case kSbSystemPropertySystemIntegratorName:
case kSbSystemPropertySpeechApiKey:
return false;
#if SB_API_VERSION >= 14
// Implementation provided for testing purposes only
case kSbSystemPropertyAdvertisingId:
return CopyStringAndTestIfSuccess(
out_value, value_length,
starboard::GetEnvironment("COBALT_ADVERTISING_ID").c_str());
case kSbSystemPropertyLimitAdTracking:
return CopyStringAndTestIfSuccess(
out_value, value_length,
starboard::GetEnvironment("COBALT_LIMIT_AD_TRACKING").c_str());
#endif
case kSbSystemPropertyFriendlyName:
return CopyStringAndTestIfSuccess(out_value, value_length, kFriendlyName);
case kSbSystemPropertyPlatformName: {
return CopyStringAndTestIfSuccess(out_value, value_length,
"X11; Linux armv7l");
}
#if SB_API_VERSION >= 15
case kSbSystemPropertyDeviceType:
return CopyStringAndTestIfSuccess(out_value, value_length,
starboard::kSystemDeviceTypeUnknown);
#endif
default:
SB_DLOG(WARNING) << __FUNCTION__
<< ": Unrecognized property: " << property_id;
break;
}
return false;
}